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Oct. 14, 1930. F. G. WIKSTROM Re. 17,827

SHEET METAL FITTING AND METHOD OF ATTACHING THE SAME TO METAL WALLS Original Filed March 31, 1927 3 79- [2x1 8 17 27\\ g 21 1g :45 11 20 H 21 -26 VENTOR g u h- 1 02%? Y 5% ATTORNEYS Reissued Oct. 14, 1930 UNITED STATES PATENT OFFICE FRANK G. WIKSTBOI, OF BROOKLYN, NEW YORK, ASSIGNOR TO HADWIK MFG. CO. INC., 01 BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK SHEET-METAL FITTING AND METHOD OF ATTACHING THE SAME TO METAL WALLS Original application filed March 31, I927, Serial No. 179,733. Divided and application filed September 28, 1927, Serial No. 222,409. Original No. 1,722,258, dated July 23, 1929. Application for reissue filed Kay 31, 1980. Serial No. 458,768.

This invention relates to sheet metal fittings adapted to be attached to metal walls, and is herein shown as embodied in a bung sput applied to a metallic barrel head, al-

5 though it may, of course, be used in any container wall.

The general objects ofthe invention are to provide an improved sheet metal fitting and metallic structure and an im roved method by which such fitting may e securely attached to a metal wall.

. The Patent No. 1,722,256 issued July 23, 1929, for the reissue of which this application is filed, resulted from an ap hcation 16 Ser. No. 222,409 filed Sept. 28, 192 which was a division of an application Ser. No.

179,733 filed March 31, 1927.

The invention will be understood from the following description taken in connection M with the accompanying drawing in which Figure 1 is a sectional view through a hung sput construction embodying my invention;

Figure 2 is a central sectional view showing a pair of die members adapted to be used in initially securing the bung sput to the barrel headand showing also the bung sput and barrel head in position to be operated upon by said die members; Figure 3 is a central sectional view showing another pair of die members adapted to be used in carryingout the final operation in securing the bung sput to the barrel head and also showing the bung sput and barrel head in position to be operated upon by said die members.

Referring to the drawing, the numeral 11 indicates a barrel head provided with an opening 12 surrounded by a depending anchor flange 15 with which the bung sput 16 cooperates, so as to prevent relative movement therebetween or leakage, in the manner hereinafter described. The bung sput is so designed as to enable it to be stamped and otherwise formed in suitable dies and is also designed so as to enable it to be securely attached to the barrel head 11, before the latter is embodied in the barrel, by means of dies shown in Figures 2 and 3 and hereinafter described.

As shown in the drawing, the bung sput 16 includes a bung-receiving portion in the form of an internally screw-threaded tubular member 17 formed integral with a relatively flat gasket seat 18 carryingxa downwardly and outwardly projectin s irt 19 which terminates in a horizontal y disposed base portion 20, the outer margin of which is turned back upon itself, thus forming an upwardly and inwardly projecting lock flan e 21, having a width substantially equal to tl e width of the base portion and havin its end, as shown in Figure 2, spaced a suificient distance from the outer inclined face of the skirt 19 to permit the anchor flange 15 of the barrel head to enter the space afforded between the skirt 19 and the lock flange '21 preparatory to securing the bung sput 16 to the barrel head 11.

In attaching the bung sput 16 to the barrel head 11, the bung sput is placed upon a suitable die member 23, having an upwardly projecting annular supporting rib 24, so shaped as to conform to the space afi'orded between the tubular member 17 and the skirt 19 and to suplport the bun sput in the position shown in igure 2. sput 16 thus supported, thebarrel head 1 to which the bung sput is adapted to be connected. and which has not yet been attached to the barrel, is so positioned beneath a suitable die member 25 that the anchor flange 15 carried by the barrel head .11 is located in alignment with the opening or space 'afl'ordecl between the skirt 19 and the upper end of the lock flange 21. Before placing the barrel head 11 in the position shown in Figure 2,

the outer surface of the anchor flange 15, may,

if desired, be coated with a suite le sealing compound, not shown, in order to further insure an air and liquid-tight seal between the bung sput 16 and the barrel head 11 after these parts have been attached to one another. After positioning the barrel head 11 beneath the die member 25, as shown in Figure 2, the die member 25 is moved downwardly thereby forcing the lower end of the anchor flange 15 into sliding! contact with the outer inclined face of the skirt 19, which in turn deflects the anchor flange 15 outwardly, as the die member 25 continues to move downwardly, so that the lower end of the anchor flange 15 is ultimately forced th the bun 7 width of the inner wall of the lock flange 21,

fold between the anchor into intimate abutting en agement with the bung sput 16 at the fol of the base portion 20 and lock flange 21 of the bung sput. In order to insure such intimate contact, the anchor flange 15 is so dimensioned that it rojects downwardly, as shown in Figure 2, or a distance somewhat greater than the plus the thickness of the metal of the lock flange at its free end. Inasmuch as the lower end of the anchor flange 15 moves into engagement with the bung sput 16 at the fold oining the lock flange 21 and the base ortion 20, before the the member 25 comp etes its downward movement, the metal which surrounds the opening 12 in the barrel head 11 and is backed up by a depending abutment 27 of the die member 25, is forced outwardly along the outer curved face of the abutment 27 and over the adjacent face of the die member 25, as the die member 25 completes its downward movement, thereby causing the barrel head 11 to buckle or become distorted, as shown in Figure 3, such buckling or distortion being permitted by reason of clearance between the adjacent surfaces of the die members 23 and 25 in their final position. Immediately after the lower end of the anchor flange 15 engages the bun sput 16 at the fold of the base portion 20 and lock flan e 21, contact between the upper end of the lock flange 21 and the barrel head 11 is established, and as the die member 25 continues its downward movement the lock flange 21, backed up by an abutment 28 formed integral with the die member 23, is moved along the lower face of the barrel head and into close enga ement with the ange 15 and the container wall, such fold bein backed up by the depending abutment 2 of the die member 25. As the die member 25" completes its downward movement, the lock flan e 21, backed up by the abutment 28 of the ower die member 23, is moved downwardly into horizontal position, and the flange 15 is caused to assume a similar position, whereupon a setting blow is delivered by the die member 25 to the barrel head 11- directly over the flanges 15 and 21, thereby forcing the base portion 20, anchor flange 15, lock flange 21, and container wall into firm face-to-face contact.

After having thus far assembled the bung sput 16 with respect to the barrel head 11, the head with its attached bung sput is placed upon a die member 29 having an upwardly projecting supporting rib 30 and otherwise the same as the, die member 23 above explained. except for the omission of the abutment 28 shown in Figure 2. It is upon the die member 29 that the final operation is carried out in securing the bung sput 16 to the barrel head 11, as shown in Figure 1, and in carrying out this final operation a die member 31, shown in Figure 3, is employed. This die member 31 is provided with an annular depending portion 32, which as the die member 31 moves downwardly, engages the buckled or distorted portion or area of the barrel head 11 and moves or forms such head over and down into intimate engagement with the bung sput 16 at the fold between the lock flange 21 and the base portion 20, as shown in Figure 1. It is at this point in the assembling that the buckling or distortion of the barrel head 11, as explained in connection with Figure is utilized to a further advantage, such further advantage residing in the fact that the necessity for any substantial drawing or stretching of metal in the barrel head 11 is obviated, since the required amount of metal necessary to the final operation is supplied from the buckled or distorted area with the result that such area againassumes its normally flat condition.

The die member 31 is cut away or relieved as shown at 33 in order to accommodate the combined thickness of the barrel head 11, base portion 20, lock flange 21 and anchor flange 15, and to at the same time impart a setting blow to the barrel head 11 directly above the horizontally disposed anchor flange 15 and lock flange 21 at or about the time the die member 31 completes its downward movement, thus establishing an air and li uid tight connection between the barrel hea 11 and the bung sput 16.

While many forms of caps or closures may be used with the bung sput construction here outwardly from the upper end of said tubu-' lar portion, a skirt pro ecting outwardly and downwardly from said gasket seat, a base portion projecting outwardly from the bot-- tom ofsaid skirt, and a lock flange inclined upwardly and inwardly from said base portion at a substantial angle from the vertical and towards said skirt and terminating a short distance from said skirt.

2. A sheet metal bung sput adapted to be attached to a container wall, characterized prior to its attachment by a tubular bungreceiving portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting outwardly and downwardly from said gasket seat, a base portion projecting outwardly from the bottom of said skirt, and a-lock flange inclined upwardly and inwardly from said base portion at a substantial angle to the vertical and towards said skirt and terminating a short distance from said skirt. said lock flange hav ing a length substantially equal to the length of said base portion.

3. In a metallic receptacle, a Wall having an opening thereinsurronnded by an anchor flange, and a sheet metal bung sput of the kind described in .claim 1 having a tubular bung-receiving portion, a gasket'seat projecting outwardly from the upper end of said tubular portion, :a skirt projecting outwardly and downwardly from saidgasket seat, a base portion projecting outwardly from the bottom of said skirt, a lock flange extending upwardly and inwardly trom said base portion and into the space between said anchor flange and the-container wall,t'he edge of said anchor flange being in close engagement. with the inside of the told between the lock flange and base portion of the sput, the edge of the lock flange being in close engagement with the inside of the fold between said-anchor flange and thecontainer wall. and the outside of the fold between said anchor flange and the container wall being in close engagement with the bottom portion of said skirt.

4. 'In-ameta llicreceptacle,-awall having an opening therein surrounded by an anchor flange, and ,a sheet metal bung sput of the kind described in claim 1 having a tubular bung-receiving portion, a gasket seat projccti-ng outwardly from the upper end of said tubular portion, askirt projecting outwardly and downwardly from said gasket seat, a

base port-ion projecting outwardly from the bottom of said sk-irt, a lock flange extending upwardly and inwardly ,from said base portion and intozthe space between said anchor flangeand the container wa'lhthe edge o-f said anchor flange :being in .closeengagement with the inside of the fold between the look flange and base portion of thejsput, -the edge of the lock flange being in close engagement with the inside of the fold between said anchor flange and the container wall. the outside of the fold between said anchor flange and the container wall being in closeengagemcntwith the bottom portion of said skirt, and the container wall being folded down into engagement with the outside of the fold between the base portion and the lock flange of the sput.

5. The method of attaching to a container wall, a sheet metal bung sput having a'tubular bung receiving portion, agasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting outwardly and downwardly from said gasket seat, a base portion projecting outwardly from the bottom of said skirt, and a lock flange inclined upwardly and inwardly from said base portion at a substantial angle from. the vertical and toward said skirt and ternlinating a short distance from said skirt;

.die which engages t tainer wall an opening surrounded by an anchor flan e having a width somewhat greater than t e width of the inner wall of the lock flange of the sput plus the thickness of said lock flange; su porting said sput on a he under side of its gasket seat, skirt, base portion and fold between the base portion and lock flange; introducing the anchor flange .of the container wall into thespace between the lock flange and the skirt of :the sput; and forcing the container wall downwardly and the anchor flange downwardly and outwardly along the surface of the skirt and base portion of the sput by a die engaging the top of the con-- tainer'wall and the fold between said wall and its anchor flange until the base portion and anchor flange and the look-flange and container wall are in iaceto face contact and v:until the edge of the anchor flange is in close engagement with the inside of the fold between the lock flange and the base ortion of the sput and until the'edge of t e lock flange is in close engagement with the inside of the fold between the anchor flange and thecontainer wall and until the voutside of the fold between the anchor flange and con tainer wall is in close engagement with the bottom portion of theskirt of the sput.

6. The method ofattaching to a'container Wall a sheet meta-lbung sput having a tubular bung receiving ort1on, a gasket seat projecting outwardly i i'om the upper endof said tubular portion,a skirt projecting outwardly and downwardly from said gasket seat, .a :base portion projecting outwardly from the bottom of ,said skirt, and a t lock flange inclined "upwardly and inwardly from said 'ibasenportion at a substantial angle from the vertical and toward said skirt and terminating a short distance ztrom said skirt, which method consists in forminin the container wall an opening surrounded by an anchor flange haying a width somewhat greater than the width of the inner wall of the lock flange of the sput plus the thickness of said lock flange; supportin said sput on a die which engages the un er side of its gasket seat, skirt, base portion and fold between the base portion and lock flange 5 introducing the anchor flange of the container wall into the space between the lock flange and the skirtof the sput; and forcing the container wall downwardly and the anchor flange downwardly and outwardly along the surface of the skirt and base portion of the sput by a die engaging the top of the container wall and the fold between said wall and its anchor flange until the base portion and anchor flange and the lock flange and container wall are in face to face contact and until the edge of the anchor flange is in close engagement with the inside of the fold between the lock flange and the base portion of the sput and until the edge of the lock flange is in close engagement with the inside of the fold between the anchor flange and the container wall and until the outside of the fold between the anchor flange and container wall substantial angle from the vertical and towards said skirt and terminating a short distance from said skirt.-

8. A sheet metal fitting adapted to be attached to a metal wall, characterized prior to its attachment by a skirt projecting outwardly and downwardly, a base portion projecting outwardly from the bottom of said skirt, and-a lock flange inclined upwardly and inwardly from said base portion at a substantial angle to the vertical and towards said skirt and terminating a short distance from said skirt, said lock flange having a .len h substantially equal to the length of sai base portion. V

9. In a metallic structure, a metal wall having an opening therein surrounded by an anchor flange, and a sheet metal fitting of the kind described in claim 7 having a skirt projecting outwardly and downwardly, a

ase portion projecting outwardly from the bottom of said skirt, a lock flange extending upwardly and inwardly from said base portion and into the space between said anchor flange and said wall, the edge of said anchor flange being in close engagement with the inside of the fold between the lock flange and base portion of the fitting, the edge of the lock the inside of the fold between said anchor flange and said wall, and the outside of the fold between said anchor flange and said wall bein in close engagement with the bottom portion of said skirt.

10. In a metallic structure, a metal wall having an opening therein surrounded b an anchor flange, and a sheet metal fitting o the kind described in claim 7 having a skirt projecting outwardly and downwardly, a base portion projecting outwardly from the bottom of said skirt. a lock flange extending upwardly and inwardly from said base portion and into the space between said anchor flange and said wall, the edge of said anchor flange being in close engagement with the inside of the fold between the lock flange and base portion of the fitting, the edge of the lock flange being in close engagement with the in side oithe fold between said anchor flange ange being in close engagement with and said wall, the outside of the fold between said anchor flange and said wall being in close engagement with the bottom portion of said skirt, and said wall bein folded down into engagement with the outside of the fold between the base portion and the lock flange of the fitting.

11. The method of attaching to. a metal wall, a sheet metal fitting, having a skirt rojccting outwardly anddownwardly, a ase portion projecting outwardly from the bottom of said skirt, and a lock flange inclined upwardly and'inwardly from said base portion at a substantial angle from the Vertical and toward said skirt and terminating at short distance from said skirt; which method consists in forming in said wall an opening surrounded by an anchor flange havlng a width somewhat greater'than the width of the inner wall of the lock flange of the fitting plus the thickness of said lock flange; supporting said fitting on a die which engages the under side of its skirt, base portion and fold between the base portion and lock flan e; introducing the anchor flange-of said wal into the s ace between the lock flange and the skirt of the fittin and forcing said-wall downwardly and t e anchor flange downwardly and outwardly along the surface of the skirt and base portion of the fitting by a die engaging the top of said wall and the fold between said wall and its anchorflange until the base portion and anchor flange and the lock flange and said wall are in faceto face contact and until the edge of the anchor flange is in close engagement with the inside of the fold between the lock flange and the base portion of the fitting and until the edge of the lock flange is in close engagement with the inside of the fold between the anchor flange and said wall and until the outside of the fold between the anchor flange and said wall is in close engagement with the bottom portion of the skirt-of the fitting.

12. The method of attaching to a metal wall a sheet metal fitting having a skirt projecting outwardly and downwardly, a base portion projecting outwardly from the bottom of said skirt, and a lock flange inclined upwardly and inwardly from said base portion at a substantial angle from the vertical and toward said skirt and terminating a short distance from said skirt, which method consists in forming in said wall an opening surrounded by an anchor flange having awidth somewhat greater than the width of the inner wall of the lock flange of the fitting plus the thickness of said lock flange; supporting said fitting on a die which engages the under side of its skirt, base portion and fold between the base portion and lock flange, introducing the anchor flange of said wall into the space between the lock flange and the skirt of the fitting; and forcing said wall downwardly and the anchor flange downwardly and outwardly alon the surface of the skirt and base portion 0 the fitting by a die engagin the top of said wall and the fold between said wall and its anchor flange until the base portion and anchor flange and the lock flange and said wall are in face to face contact and until the edge of the anchor flange is in close engagement with the inside of the fold between the lock flange and the base portion of the fitting and until the edge of the lock flange is in close engagement with the inside of the fold between the anchor flange and said Wall and until the outside of the fold between the anchor flange and said wall is in close engagement with the bottom portion of the skirt of the fitting and until said wall is folded down into enga ement with the outside of the fold between tfle base portion and the lock flange.

In testimony whereof, I have aflixed my signature to this specification.

FRANK G. WIKSTROM. 

